Fastener to bind loose sheets of paper



Nov. 1927.

R. WElLENMANN FASTENER TO BIND LOOSE SHEETS OF PAPER Filed Dec.

' Patented Nov. 1, 1927.

ROBERT WEILENMANN, or SCZ-IAFFHA'USEN, swrrzuamitny FASTENER; To 131m) Loose-streams or" PAPE Application filed December-8, 1926, Serial No.153gl25, and in Germany December}, 1925.

i The present invention. relates to a new and I improved fastener for loose. sheets, letters andsoon. v The main object of the invention 1810- provide a simple, strongand cheap device which is easily and quickly operated and which takes up but little space inthe folder, file or binder in which the'fastener may be mounted. I

With'these and other "objects in view the invent-ion consists in the particular construction of the device and of its parts which in the specification is particularly set forth.

In the accompanying drawings the preferred construction of the new device is shown by way of an example.

, Fig. 1 shows part of an open folder or binder in an end view,

Fig. 2 is a top view and 1 Fig. 3 a side view of the fastening device of the hinder, the device being shown in an inverted position. I

Fig. 4 illustrates a closed binder in an end view and Fig. 5 the same part in a top view with the cover broken away.

Fig. 6 shows on a larger scale a cross-section through the fastening device and Fig. 7 is a section view of the end portion of binding needle.

The folder or file comprises a cover 1, 2 which may be made of stiff paper" cardboard or the like. At 3 the cover l'is pro vided with a double'fold and to said fold a flat strip 4 of suitable metal for instance brass, steel etc. is fixed,'by means of two flexible prongs orneedles 5 fixed at one end .to the strip and passing through said folds.- Each prong-5 comprises a coiled wire of springy material for instance steel wire and a conical head 7 fixed to the free end of said wire coil. On the prongs 5 the loose paper sheets A are assembled. The sheets are perforated in the usual manner and by well known punching machines the holes made being such that the prongs 5 pass freely through them. On the top of the pile of loose sheets A a sheet metal strip 8 is placed which is provided with holes through which the prongs 5 pass. On the strip;8 two bearprongs 5 may be easily passed. The centre portion 10 is provided with a hump 14E lying in a common plane with the shanks 11.

the hand to move the slide. tongue 15 and the bearing 9 a coiled spring the strip 8 movable between the bent over sideedgesyof thestrip 8a slide. 12 is-arranged. The slide 12 passes. over the er.

16 is arranged which tends to move: the slide '12 overthe hump 14. p

To place papers in the file, the strip8 and i the parts-fixed thereto are removed, when the prongs 5 assume a vertical position 0wing to their springy nature. The'papers A are placed in the file on said prongs 5 and now the strip 8 with the grip standingvertical thereon (Fig. 1) is passed on the'prongs:

in such. a manner that the prongs 5 pass 1 1 1 (Fig. 5) the grip is locked and the fas through the hollow shanks 11. The strip 8 tener is now closed. To open the fastener the slide 12 is moved by hand against the v action of spring 16, the grip is turned to stand upright and the slide12 passes under the action of spring 16 upwards in Fig. 2

recess 13. The grip is thenheld' by the slide 12 in its upright position. To conveniently remove any paper from the prongs in the inverted'position shown in in such amanner thatthe'hump 14 enters the p the file the strip 8 withzthe grip is passed on Fig. 3. All the papers abovethat one del sired are now assembled on the downwardly projecting shanks 11; the ipile above the desired document is not disturbed and may be placed on the lowerfile'as' a whole after the desired paper has been taken from the v prongs.

Within the coiled wire 5 a short core 6 of rubber or the like is arranged near the end thereof to give the prongs 5 some stiffness and to make the insertion into the shanks easy.

What I wish Patent is:- 7 r 1. A fastener to bind loos'efsheets of paper to secure by S. Letters adapted to be connected with a folder, or

the like comprising in combination'a strip of stifi material, two flexible prongs fixed thereto, a second-strip of stiff material, and

a U-shaped grip rotatably mounted on ther I stiff 'mat-erial, two flexible prongs fixed thereto, a second strip of stiff material, a U-shaped grip rotatably mounted on the sec- 0nd said strip having a bend or hump on its centre portion and also having hollow shanks adapted to recelve said prongs, and a slide on the second named strip adapted to pass over the bend of the grip when the grip lies flat on the strip, to thereby lock the grip.

' 3. A fastener to bind loose sheets of paper adapted to be connected with a folder, or the like comprising incombination a strip of stiff material, two 'fiexible prongs fixed thereto, a second strip of stiff material, a U-shaped grip rotatably mounted on the second said strip, having hollow shanks adapted to receive said prongs, a bend or hump on the centre portion of the grip, a slide on the second said strip adapted to pass over the bend of the grip when the grip liesvfiat on the strip and to lock the grip, said slide having a recess to receive the said bendand to secure the grip in its upright position on the strip. I

In witness whereof I affi x my signature.

ROBERT WEILENMA-N N. 

